:root {
    color-scheme: dark;
    --dirt-dark: #4a2f1c;
    --dirt: #6b4527;
    --dirt-light: #8a5a36;
    --cave-dark: #1c1a17;
    --cave: #2b2722;
    --cave-mid: #3a352e;
    --cave-light: #55503f;
    --rock-dark: #4a4a4a;
    --rock: #6e6e6e;
    --rock-light: #9a9a9a;
    --lava-dark: #8a1a0c;
    --lava: #d83920;
    --lava-glow: #ff6a2c;
    --moss: #4a6b2f;
    --moss-light: #7a9a4a;
    --bone: #e8dcc4;
    --ink: #f4ecd8;
    --ink-muted: #b8ad94;
    --line: #2a2620;
    --shadow: 0 2px 0 #00000040, 0 6px 18px #00000060;
    --pixel-font: "VT323", "Courier New", monospace;
    --display-font: "Press Start 2P", monospace;
    --body-font: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--cave-dark);
  color: var(--ink);
  font-family: var(--body-font);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-image:
    radial-gradient(circle at 20% 30%, #3a352e55 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, #3a352e55 0%, transparent 40%),
    repeating-linear-gradient(45deg, #1c1a17 0 8px, #15130f 8px 16px),
    repeating-linear-gradient(-45deg, transparent 0 12px, #0a0907 12px 24px);
  background-attachment: fixed;
}

/* --- layout ---- */
.app {
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: 300px 1fr 280px;
  grid-template-areas:
    "header header header"
    "left canvas right";
  height: calc(100vh - 34px); /* minus statusbar */
}

/* --- header --- */
header {
  grid-area: header;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  background: linear-gradient(180deg, var(--cave-mid) 0%, var(--cave) 100%);
  border-bottom: 3px solid var(--line);
  box-shadow: 0 4px 0 #00000040;
  z-index: 5;
}

.brand { display: flex; align-items: baseline; gap: 10px; white-space: nowrap; }
.brand h1 {
  font-family: var(--display-font);
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--bone);
  text-shadow: 2px 2px 0 #000;
}
.brand-sub {
  font-family: var(--pixel-font);
  font-size: 17px;
  color: var(--lava-glow);
  letter-spacing: 1px;
}

.header-title { flex: 1; min-width: 0; }
#world-name {
  width: 100%;
  max-width: 380px;
  padding: 8px 12px;
  background: var(--cave-dark);
  border: 2px solid var(--cave-light);
  color: var(--ink);
  font-family: var(--pixel-font);
  font-size: 18px;
  outline: none;
  transition: border-color 150ms;
}
#world-name:focus { border-color: var(--lava); }

.header-actions { display: flex; align-items: center; gap: 10px; }

.back-link {
  font-family: var(--pixel-font);
  font-size: 16px;
  color: var(--ink-muted);
  text-decoration: none;
  border: 2px solid var(--cave-light);
  padding: 6px 10px;
  transition: color 120ms, border-color 120ms;
}
.back-link:hover { color: var(--bone); border-color: var(--lava); }

/* --- generic button --- */
.btn {
  font-family: var(--display-font);
  font-size: 9px;
  letter-spacing: 0.5px;
  padding: 10px 12px;
  border: 2px solid;
  cursor: pointer;
  text-transform: uppercase;
  transition: transform 100ms, box-shadow 100ms;
  box-shadow: 0 3px 0 #00000060;
}
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 #00000060; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--lava); color: var(--bone); border-color: var(--lava-dark); }
.btn-primary:hover { background: var(--lava-glow); }
.btn-secondary { background: var(--cave-light); color: var(--bone); border-color: var(--rock-dark); }
.btn-secondary:hover { background: var(--rock); }
.btn-ghost { background: transparent; color: var(--ink-muted); border-color: var(--cave-light); }
.btn-ghost:hover { color: var(--bone); border-color: var(--rock-light); }
.btn.danger { color: var(--lava-glow); border-color: var(--lava-dark); }
.btn.danger:hover { background: var(--lava-dark); color: var(--bone); }

:focus-visible { outline: 2px solid var(--lava); outline-offset: 2px; }

/* --- panels --- */
.panel {
  background: linear-gradient(180deg, var(--cave) 0%, var(--cave-dark) 100%);
  overflow-y: auto;
  padding: 16px;
}
.panel-left { grid-area: left; border-right: 3px solid var(--line); }
.panel-right { grid-area: right; border-left: 3px solid var(--line); }

.panel-block { margin-bottom: 22px; }
.panel-block h2 {
  font-family: var(--display-font);
  font-size: 9px;
  color: var(--ink-muted);
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.panel-block h2 .muted { color: var(--rock); }
.small { font-size: 8px; }

.panel-note {
  font-family: var(--pixel-font);
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.35;
  margin-top: 10px;
}
.panel-note b { color: var(--bone); }

/* --- tools (floating over canvas) --- */
.float-tools {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 6;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px;
  background: rgba(27, 25, 22, 0.92);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}
.float-tool {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 38px;
  background: var(--cave-mid);
  border: 2px solid var(--cave-light);
  color: var(--ink-muted);
  cursor: pointer;
  transition: border-color 120ms, background 120ms, color 120ms;
}
.float-tool svg { width: 20px; height: 20px; }
.float-tool:hover { border-color: var(--rock-light); color: var(--bone); }
.float-tool.active {
  border-color: var(--lava);
  background: var(--dirt-dark);
  color: var(--bone);
}
.float-tool .kbd {
  position: absolute;
  right: 3px; bottom: 2px;
  font-family: var(--pixel-font);
  font-size: 10px;
  line-height: 1;
  color: var(--rock);
}
.float-tool.active .kbd { color: var(--lava-glow); }

/* --- palette --- */
.palette { display: flex; flex-direction: column; gap: 12px; }
.palette-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 12px;
}
.palette-tab {
  font-family: var(--display-font);
  font-size: 9px;
  letter-spacing: 1px;
  padding: 10px 6px;
  background: var(--cave-mid);
  border: 2px solid var(--cave-light);
  color: var(--ink-muted);
  cursor: pointer;
  text-transform: uppercase;
  transition: border-color 120ms, background 120ms, color 120ms;
}
.palette-tab:hover { border-color: var(--rock-light); color: var(--bone); }
.palette-tab.active { border-color: var(--lava); background: var(--dirt-dark); color: var(--bone); }
.palette-tab .tab-count {
  font-family: var(--pixel-font);
  font-size: 12px;
  color: var(--rock);
  margin-left: 4px;
  white-space: nowrap;
}
.palette-tab.active .tab-count { color: var(--lava-glow); }
.palette-search {
  width: 100%;
  margin-bottom: 10px;
  padding: 8px 10px;
  background: var(--cave-dark);
  border: 2px solid var(--cave-light);
  color: var(--ink);
  font-family: var(--pixel-font);
  font-size: 16px;
  outline: none;
}
.palette-search:focus { border-color: var(--lava); }
.palette-search::placeholder { color: var(--rock); }
.palette-tab.active[data-group="background"] { border-color: var(--moss); }
.palette-tab.active[data-group="block"] { border-color: var(--lava); }
.swatch-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 5px 2px 4px;
  border: 2px solid var(--cave-light);
  background: var(--cave-mid);
  cursor: pointer;
  transition: border-color 120ms, transform 120ms;
}
.swatch:hover { border-color: var(--rock-light); transform: translateY(-1px); }
.swatch .sw { width: 26px; height: 26px; border: 2px solid #00000060; }
.swatch .lb {
  font-family: var(--pixel-font);
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1;
  text-align: center;
}
.swatch.active { border-color: var(--lava); box-shadow: 0 0 10px #d8392040; }
.swatch.active .lb { color: var(--bone); }

/* --- canvas --- */
.canvas-wrap {
  grid-area: canvas;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 40%, #4a3a2a40 0%, transparent 35%),
    radial-gradient(circle at 70% 60%, #d8392015 0%, transparent 30%),
    var(--cave-dark);
  touch-action: none;
}
#world-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  image-rendering: pixelated;
}
.canvas-wrap.panning #world-canvas { cursor: grabbing !important; }

.canvas-hint {
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--pixel-font);
  font-size: 15px;
  color: var(--ink-muted);
  background: var(--cave);
  padding: 5px 12px;
  border: 2px solid var(--line);
  pointer-events: none;
  white-space: nowrap;
}

.canvas-controls {
  position: absolute;
  bottom: 14px; right: 14px;
  display: flex;
  gap: 6px;
  background: var(--cave);
  border: 2px solid var(--line);
  padding: 6px;
  box-shadow: var(--shadow);
}
.canvas-controls button {
  width: 30px; height: 30px;
  background: var(--cave-mid);
  border: 1px solid var(--cave-light);
  color: var(--bone);
  cursor: pointer;
  font-family: var(--pixel-font);
  font-size: 17px;
}
.canvas-controls button:hover { background: var(--dirt); }

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--ink-muted);
  text-align: center;
  padding: 20px;
  pointer-events: none;
}
.empty-state h3 {
  font-family: var(--display-font);
  font-size: 11px;
  color: var(--bone);
  margin-bottom: 10px;
}
.empty-state p { font-family: var(--pixel-font); font-size: 17px; max-width: 340px; }

/* --- right panel fields --- */
.field { margin-bottom: 12px; }
.field label {
  display: block;
  font-family: var(--pixel-font);
  font-size: 15px;
  color: var(--ink-muted);
  margin-bottom: 6px;
}
.field select, .field input {
  width: 100%;
  padding: 8px 10px;
  background: var(--cave-dark);
  border: 2px solid var(--cave-light);
  color: var(--ink);
  font-family: var(--pixel-font);
  font-size: 16px;
  outline: none;
}
.field select:focus, .field input:focus { border-color: var(--lava); }

/* brush preview */
.brush-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  background: var(--cave-mid);
  border: 2px solid var(--cave-light);
}
.brush-swatch { width: 46px; height: 46px; border: 3px solid #00000080; flex-shrink: 0; }
.brush-name { font-family: var(--pixel-font); font-size: 20px; color: var(--ink); }
.brush-layer {
  font-family: var(--display-font);
  font-size: 8px;
  color: var(--lava-glow);
  margin-top: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 8px;
  background: var(--cave-mid);
  border: 2px solid var(--cave-light);
  margin-bottom: 4px;
  font-family: var(--pixel-font);
  font-size: 15px;
  color: var(--ink-muted);
}
.stat-row b { color: var(--bone); }

.data-actions { display: flex; flex-direction: column; gap: 8px; }
.data-actions .btn { width: 100%; padding: 11px; font-size: 9px; }

/* --- status bar --- */
.statusbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 34px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 16px;
  background: linear-gradient(180deg, var(--cave-mid) 0%, var(--cave) 100%);
  border-top: 3px solid var(--line);
  font-family: var(--pixel-font);
  font-size: 15px;
  color: var(--ink-muted);
  z-index: 20;
}
.statusbar span { white-space: nowrap; }
#sb-save { margin-left: auto; }

/* --- toast --- */
.toast {
  position: fixed;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--cave);
  color: var(--bone);
  padding: 12px 22px;
  border: 2px solid var(--lava);
  font-family: var(--pixel-font);
  font-size: 17px;
  box-shadow: var(--shadow);
  transition: transform 250ms;
  z-index: 100;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* --- used tiles modal --- */
.modal-overlay {
  position: fixed; inset: 0; background: #000a;
  display: flex; align-items: center; justify-content: center;
  z-index: 40; padding: 20px;
}
.modal-overlay[hidden] { display: none; }
.modal {
  width: min(540px, 100%); max-height: 80vh; display: flex; flex-direction: column;
  background: var(--cave); border: 3px solid var(--rock-dark); box-shadow: var(--shadow); color: var(--ink);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 2px solid var(--line); background: var(--cave-mid);
}
.modal-head h2 { font-family: var(--display-font); font-size: 13px; color: var(--bone); letter-spacing: .5px; }
.modal-close { background: none; border: none; color: var(--rock-light); font-size: 18px; line-height: 1; cursor: pointer; padding: 4px 6px; }
.modal-close:hover { color: var(--lava-glow); }
.modal-body { overflow: auto; padding: 14px 16px; }
.used-group h3 {
  font-family: var(--display-font); font-size: 11px; color: var(--lava-glow);
  margin: 14px 0 8px; display: flex; align-items: baseline; gap: 8px;
}
.used-group:first-child h3 { margin-top: 0; }
.used-total { color: var(--rock-light); font-family: var(--pixel-font); font-size: 14px; font-weight: 400; }
.used-empty { color: var(--ink-muted); font-size: 12px; font-style: italic; margin-bottom: 14px; }
.used-list { list-style: none; margin: 0 0 6px 0; padding: 0; }
.used-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 5px 8px; border-bottom: 1px solid var(--line); font-size: 13px;
}
.used-list li:nth-child(even) { background: #ffffff08; }
.used-item { display: flex; align-items: center; gap: 8px; min-width: 0; }
.used-thumb { width: 22px; height: 22px; border: 1px solid var(--rock-dark); flex: 0 0 auto; object-fit: contain; image-rendering: pixelated; }
.used-thumb-none { background: #ffffff12; }
.used-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.used-count {
  font-family: var(--pixel-font); font-size: 15px; color: var(--bone); flex: 0 0 auto;
  background: var(--cave-mid); border: 1px solid var(--rock-dark); padding: 0 8px; border-radius: 2px;
}
.modal-foot { border-top: 2px solid var(--line); padding: 10px 16px; display: flex; justify-content: flex-end; }
.modal-foot .btn { width: auto; padding: 8px 16px; }

/* --- responsive --- */
@media (max-width: 1100px) {
  .app { grid-template-columns: 240px 1fr 240px; }
}
@media (max-width: 860px) {
  html, body { overflow: auto; }
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    grid-template-areas: "header" "canvas" "left" "right";
    height: auto;
    min-height: 100vh;
    padding-bottom: 34px;
  }
  .canvas-wrap { height: 62vh; min-height: 420px; }
  header { flex-wrap: wrap; row-gap: 10px; }
  .header-title { flex-basis: 100%; order: 3; max-width: none; }
  .swatch-row { grid-template-columns: repeat(6, 1fr); }
  .canvas-hint { display: none; }
}


/* ─── World Gallery ───────────────────────────────── */
.gallery-empty {
  font-family: var(--pixel-font);
  font-size: 15px;
  color: var(--ink-muted);
  padding: 16px;
  text-align: center;
}
.gallery-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px;
  background: var(--cave-dark);
  border: 2px solid var(--cave-light);
  margin-bottom: 8px;
}
.gallery-card canvas {
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: #000;
  image-rendering: pixelated;
}
.gallery-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.gallery-name {
  font-family: var(--pixel-font);
  font-size: 16px;
  color: var(--bone);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.gallery-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.gallery-btn {
  font-size: 9px !important;
  padding: 6px 8px !important;
}

/* ─── Discord credit card ──────────────────────────── */
.discord-card {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: linear-gradient(180deg, var(--cave) 0%, var(--cave-dark) 100%);
  border: 2px solid var(--cave-light);
  color: var(--ink-muted);
  font-family: var(--pixel-font);
  font-size: 17px;
  text-decoration: none;
  margin-top: 14px;
  transition: border-color 150ms, color 150ms, transform 100ms;
  box-shadow: 0 3px 0 #00000040;
}

.discord-card:hover {
  border-color: #5865F2;
  color: var(--bone);
  transform: translateY(-2px);
  box-shadow: 0 5px 0 #00000040;
}

.discord-card:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 #00000040;
}

.discord-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  transition: color 150ms;
}

.discord-card:hover .discord-icon {
  color: #5865F2;
}

/* ─── Discord header button ──────────────────────── */
.discord-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--cave-dark);
  border: 2px solid var(--cave-light);
  color: var(--ink-muted);
  font-family: var(--pixel-font);
  font-size: 15px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color 150ms, border-color 150ms, background 150ms;
}
.discord-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: color 150ms;
}
.discord-btn:hover {
  color: var(--bone);
  border-color: #5865F2;
  background: var(--cave-mid);
}
.discord-btn:hover svg { color: #5865F2; }

@media (max-width: 640px) {
  .discord-btn svg { display: inline-block; }
  .discord-btn { padding: 8px; }
}